How do I install this add-on?
you will have to edit the file yourself. You can delete the empty line between "category" and "anim stuff", it seems to trip up the bl_info parsing:

bl_info = {
   "name": "Zelda64 Importer",
   "author": "SoulofDeity",
   "blender": (2, 6, 0),
   "location": "File &gt; Import-Export",
   "description": "Import Zelda64",
   "warning": "",
   "wiki_url": "https://code.google.com/p/sods-blender-plugins/",
   "tracker_url": "https://code.google.com/p/sods-blender-plugins/",
   "support": 'COMMUNITY',
   "category": "Import-Export",
   "Anim stuff": "RodLima http://www.facebook.com/rod.lima.96?ref=tn_tnmn"
}